P75 - Generics in Java | Core Java | Java Programming |
Are you struggling to understand Generics in Java? 🤔 In this video, we’ll break down Java Generics step by step with real-world examples, interview questions, and best practices! Whether you're a beginner or preparing for a Java interview, this video is all you need!
✨ What You'll Learn:
👉 What are Generics in Java?
👉 Why do we use Generics? (Advantages & Benefits)
👉 Type Erasure in Java
👉 Generic Classes, Methods, and Interfaces
👉 Bounded Generics (extends and super)
👉 Wildcards (?, ? extends T, ? super T)
👉 Common Errors & How to Fix Them
👉 Real-World Use Cases of Generics
⭐⭐List of interview questions on the Generics in Java ⭐⭐
Note: YouTube not supporting angular brackets in description, so using parentheses (( )) instead.
❓ What are generics in Java? Why are they used?
❓ What is type erasure in Java generics?
❓ What is the difference between T, E, K, V, and ? in generics?
❓ How does Java ensure type safety using generics?
❓ What happens if we do not use generics in collections like List or Map?
❓ What are the advantages and disadvantages of using generics?
❓ Can we overload methods using different generic types?
❓ What is the difference between List(T), List(?), and List(? extends T)?
❓ How do bounded type parameters (T extends Number) work?
❓ What is the difference between ? extends T and ? super T?
❓ How do we create a generic method in Java? Give an example.
❓ Can a generic class extend a non-generic class?
❓ Can we have multiple type parameters in a generic class or method?
❓ How does type inference work in Java generics?
❓ Can a static method use generics? Why or why not?
❓ What are the limitations of Java generics?
❓ What are generic wildcards (?)? When should we use them?
❓ How do generics work with Java’s exception handling? Can we create a generic exception class?
❓ What are the use cases of ? extends T and ? super T in real-world applications?
❓ What happens when we mix generic and non-generic code?
❓ Why does List(String) behave the same as List(Integer) at runtime?
❓ Explain how generics help in avoiding ClassCastException with an example.
By the end of this video, you’ll have a solid understanding of Java Generics and know how to leverage them effectively to write type-safe, reusable, and maintainable Java code. You'll also be able to confidently use generics in real-world projects and crack Java interviews with ease! 🚀
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